We completed our interviews and oath ceremony this week. I speak from my personal experience only but I believe when you submit your N-400 applications, they try to keep track of both spouse's cases together. We filed 3 years ago and both our case statuses would change at the same time, even though I know I was the primary applicant responsible for the delay due to name and security checks.
My citizenship journey is over. I am a naturalized US citizen as of 09/23. Things that I learned from this forum gave me confidence to complete the journey. I must detail my experience for the benefit of the posterity.
Seattle USCIS DO naturalization interview experience
My wife and I went for our interviews yesterday which went well and we did attend a same day oath ceremony at the Seattle office yesterday - we are finally US citizens. Here is my experience: